Читать книгу Trees and Shrubs for English Gardens - E. T. Cook - Страница 22

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When thinking of trees and shrubs in early spring we must remember those with beautiful catkins. Of the earliest flowering hardy trees and shrubs the majority are those with flowers borne in catkins. Their appearance is one of the first evidences of the approach of spring. It is to the catkin-bearing group that the Poplars, Willows, Birches, and Alders belong. These catkins are pendulous, cylindrical, and often slender inflorescences, carrying flowers of one sex only, which spring from the axils of scaly bracts. Being mainly dependent upon the wind for their fertilisation, they have none of the varied or bright colours that are characteristic of flowers fertilised by insect agency. Often, indeed, sepals and petals are entirely absent. Still, many of these catkin-bearers possess a charm and beauty of their own, which, taken with the early, often inclement, season when they appear, make the best of them indispensable in gardens where early spring effects are desired. As a rule it is the male or pollen-bearing catkins that are most ornamental. They are longer and more graceful than the seed-bearing ones.